公开(公告)号：US09316710B2

公开(公告)日：2016-04-19

申请号：US13258622

申请日：2010-03-31

申请人： Ingmar Graesslin ,  Ferdinand Schweser ,  Peter Boernert ,  Paul Royston Harvey

发明人： Ingmar Graesslin ,  Ferdinand Schweser ,  Peter Boernert ,  Paul Royston Harvey

IPC分类号： G01R33/44 ,  G01R33/3415 ,  G01R33/561 ,  G01R33/28 ,  G01R33/54 ,  G01R33/565

CPC分类号： G01R33/3415 ,  G01R33/288 ,  G01R33/543 ,  G01R33/5612 ,  G01R33/5659

摘要： A magnetic resonance sequence includes a repetitively applied radiofrequency pulse capable of causing a specific absorption rate (SAR) hot spot. The composition of the repetitive pulse is varied to generate versions of the repetitive pulse such that the SAR hot spot changes locations with subsequent applications of the repetitive pulse. To generate versions of the pulse, a pilot scan is performed to generate a patient model. A simulation of the SAR response to each of the versions of the repetitive pulse is performed to determine the location of SAR hot spot(s). A plurality of versions of the repetitive pulse is selected to be used in the magnetic resonance sequence.

摘要翻译： 磁共振序列包括能够引起比吸收率（SAR）热点的重复施加的射频脉冲。 改变重复脉冲的组成以产生重复脉冲的形式，使得SAR热点随后应用重复脉冲而改变位置。 为了产生脉冲的版本，执行导频扫描以产生患者模型。 执行对每个重复脉冲版本的SAR响应的模拟，以确定SAR热点的位置。 选择在磁共振序列中使用多个版本的重复脉冲。

公开(公告)号：US08941380B2

公开(公告)日：2015-01-27

申请号：US12936540

申请日：2009-04-13

申请人： Ingmar Graesslin ,  Sven Biederer ,  Ulrich Katscher ,  Ferdinand Schweser ,  Peter Boernert ,  Paul Royston Harvey ,  Wilhelmus Reinerius Maria Mens

发明人： Ingmar Graesslin ,  Sven Biederer ,  Ulrich Katscher ,  Ferdinand Schweser ,  Peter Boernert ,  Paul Royston Harvey ,  Wilhelmus Reinerius Maria Mens

IPC分类号： G01R33/44 ,  G01R33/58 ,  G01R33/561 ,  G01R33/28 ,  G01R33/565

CPC分类号： G01R33/583 ,  G01R33/288 ,  G01R33/5612 ,  G01R33/5659

摘要： In a method and apparatus to enable increased RF duty cycle in high field MR scans, a specific energy absorption rate (SAR) calculation processor calculates the local and global SAR or even a spatial SAR map. By incorporating additional information as, e.g. patient position, the SAR calculation accuracy can be increased as well as by using more patient specific pre-calculated information (e.g. based on different bio meshes), the so called Q-matrices. A sequence controller maybe provided to create a global SAR optimal RF pulse. After the optimal RF pulse is applied, the SAR and its spatial distribution are determined. SAR hotspots are also determined. Q-matrices within an appropriate radius around the hotspots are averaged and added to a global Q-matrix in a weighted fashion. After the global Q-matrix is updated, a new optimal RF pulse is created.

摘要翻译： 在能够在高场MR扫描中增加RF占空比的方法和装置中，比能量吸收率（SAR）计算处理器计算局部和全局SAR或甚至空间SAR图。 通过引入附加信息，例如。 患者位置，SAR计算精度以及通过使用更多患者特定的预先计算的信息（例如，基于不同的生物网格），即所谓的Q矩阵。 可以提供序列控制器以创建全局SAR最优RF脉冲。 在施加最佳RF脉冲之后，确定SAR及其空间分布。 SAR热点也是决定的。 在热点周围的适当半径内的Q矩阵被平均，并以加权的方式加到全局Q矩阵上。 在更新全局Q矩阵之后，创建一个新的最优RF脉冲。

公开(公告)号：US08311609B2

公开(公告)日：2012-11-13

申请号：US11572712

申请日：2005-07-29

申请人： Paul Royston Harvey ,  Andriy Shmatukha

发明人： Paul Royston Harvey ,  Andriy Shmatukha

IPC分类号： A61B5/05

CPC分类号： G01R33/4804 ,  G01R33/56563

摘要： A computing unit is arranged to access phase images computed from the image data and representative of the target medium and the reference medium and carry out computing steps to yield temperature difference map. The operation of the computing is controlled by a computer program carrying computing steps programmed as instructions to a processor. The apparatus (1) includes a storage unit (8) arranged to store suitable image data which are accessed by the computer program during the computations. The storage unit (8) stores system parameters of the magnetic resonance apparatus, like the strength of the main field (B0), gyromagnetic ratio (γ), and suitable parameters of a target medium, like screen constant (α), in a file (3). The apparatus (1) further includes a working memory (6), typically based on RAM. An output (9) of the apparatus includes the computed temperature difference map, which can be used to control a suitable medical diagnostic or therapeutic device, or it may be visualized to a user or be stored for archiving purposes. For feed-back purposes, the apparatus includes a display (7) to visualize the computed temperature difference map. Preferably, the temperature difference map is visualized within a suitable interactive graphic user interface (7a).

摘要翻译： 计算单元被布置为访问从图像数据计算的代表目标介质和参考介质的相位图像，并且执行计算步骤以产生温度差图。 计算的操作由携带计算步骤的计算机程序控制，计算步骤被编程为处理器的指令。 该设备（1）包括一个存储单元（8），用于存储由计算机程序在计算过程中访问的合适的图像数据。 存储单元（8）将文件的主场（B0）强度，回磁比（γ）和目标介质的合适参数（如屏幕常数（α））存储在文件中，将磁共振装置的系统参数存储起来 （3）。 装置（1）还包括通常基于RAM的工作存储器（6）。 设备的输出（9）包括计算出的温度差图，其可用于控制合适的医疗诊断或治疗装置，或者可以将其可视化为用户或存储以用于归档目的。 为了反馈目的，该装置包括显示计算出的温差图的显示器（7）。 优选地，在适当的交互式图形用户界面（7a）中可视化温度差图。

公开(公告)号：US20110166440A1

公开(公告)日：2011-07-07

申请号：US13119876

申请日：2009-09-21

申请人： Paul Royston Harvey

发明人： Paul Royston Harvey

IPC分类号： A61B5/05 ,  G06K9/00

CPC分类号： A61B5/055 ,  A61B5/0013 ,  A61B6/03 ,  A61B6/032 ,  A61B6/566 ,  G06F19/00 ,  G16H30/40

摘要： The invention relates to a diagnostic imaging system. The system encompasses a plurality of scanning apparatuses (60, 70, 80). Each scanning apparatus (60, 70, 80) comprises scanning hardware, a data acquisition system (42) connected to the scanning hardware for generating raw image data representative of an object disposed in an imaging region of the scanning apparatus (60, 70, 80), and a reconstruction unit (50) processing the raw image data for reconstructing an image representation therefrom. The invention proposes that subsets of the raw image data generated by the data acquisition system (42) of one of the scanning apparatuses (60, 70, 80) are distributed via a communication link (90) among the scanning apparatuses (60, 70, 80) for parallel processing by the reconstruction units (50) of the respective scanning apparatuses (60, 70, 80).

摘要翻译： 本发明涉及诊断成像系统。 该系统包括多个扫描装置（60,70,80）。 每个扫描装置（60,70,80）包括扫描硬件，连接到扫描硬件的数据采集系统（42），用于产生代表设置在扫描装置的成像区域中的物体的原始图像数据（60,70,80,80 ）以及重构单元（50），用于处理用于重构图像表示的原始图像数据。 本发明提出，扫描装置（60,70,80）中的一个的数据采集系统（42）生成的原始图像数据的子集经由扫描装置（60,70,80）中的通信链路（90） 80），用于由各个扫描装置（60,70,80）的重建单元（50）并行处理。

公开(公告)号：US20100106008A1

公开(公告)日：2010-04-29

申请号：US12531360

申请日：2008-03-13

申请人： Paul Royston Harvey

发明人： Paul Royston Harvey

IPC分类号： A61B5/055

CPC分类号： G01R33/583 ,  G01R33/34046 ,  G01R33/3415 ,  G01R33/5673

摘要： It is an object of the present invention to provide a MRI technique, in which the influence of physiological factors such as respiration and cardiac pulsation on MRI results is reduced or removed. The object of the present invention is achieved by a magnetic resonance imaging system (1), comprising a first RF coil (2) adapted for acquiring magnetic resonance imaging data of a patient s body; a number of measuring elements (5, 5′, 5″, 29, 31), which are sensitive to a load changing of the first RF coil (2), said measuring elements (5, 5′, 5″, 29, 31) being adapted for acquiring data related to motion of said patient s body; and a processing unit (9) adapted for employing said motion data to correct for patient motion in magnetic resonance imaging.

摘要翻译： 本发明的目的是提供一种MRI技术，其中减少或消除了诸如呼吸和心脏搏动之类的生理因素对MRI结果的影响。 本发明的目的通过一种磁共振成像系统（1）来实现，所述磁共振成像系统包括适于获取患者身体的磁共振成像数据的第一RF线圈（2） 对第一RF线圈（2）的负载变化敏感的多个测量元件（5,5'，5“，29,31），所述测量元件（5,5'，5”，29,31） ）适于获取与所述患者身体的运动有关的数据; 以及适于在磁共振成像中采用所述运动数据来校正患者运动的处理单元（9）。

公开(公告)号：US20090278537A1

公开(公告)日：2009-11-12

申请号：US12305528

申请日：2007-06-29

申请人： Paul Royston Harvey

发明人： Paul Royston Harvey

IPC分类号： G01R33/48 ,  G01R33/44

CPC分类号： G01R33/341 ,  G01R33/288 ,  G01R33/3621 ,  G01R33/3635 ,  G01R33/3642 ,  G01R33/3657 ,  G01R33/3692

摘要： A radio-frequency (RF) coil system that simplifies multi-nuclear magnetic resonance (MR) imaging is disclosed herein. The RF coil system comprises a transmitter coil (102) for transmitting an RF signal to excite a target region of a subject. The RF coil system also comprises an independent planar receiver coil assembly (110) for receiving an MR signal from at least a portion of the target region, the planar receiver coil assembly (110) being configured to include an on-board digital receiver circuit (112) for processing the received MR signal.

摘要翻译： 本文公开了简化多核磁共振（MR）成像的射频（RF）线圈系统。 RF线圈系统包括用于发射RF信号以激发对象的目标区域的发射器线圈（102）。 RF线圈系统还包括用于从目标区域的至少一部分接收MR信号的独立平面接收器线圈组件（110），该平面接收器线圈组件（110）被配置为包括板上数字接收器电路 112），用于处理所接收的MR信号。

公开(公告)号：US20080272784A1

公开(公告)日：2008-11-06

申请号：US11571002

申请日：2005-06-24

申请人： Paul Royston Harvey ,  Gerardus Nerius Peeren

发明人： Paul Royston Harvey ,  Gerardus Nerius Peeren

IPC分类号： G01R33/385

CPC分类号： G01R33/385

摘要： The present invention relates to a magnetic resonance imaging (MRI) device and to a method for operating it. The basic components of an MRI device are the main magnet system (2) for generating a steady magnetic field, the gradient system (3) with at least one gradient coil, the RF system and the signal processing system. According to the present invention, the gradient coil is split into sub-coils (S1, S2) at least in the direction of the steady magnetic field. By doing so, the amplitude of the non-imaging component of the gradient field in the vicinity of the patient is reduced, leading to reduced peripheral nerve stimulation and thus enhanced image quality.

摘要翻译： 本发明涉及一种磁共振成像（MRI）装置及其操作方法。 MRI装置的基本部件是用于产生稳定磁场的主磁体系统（2），具有至少一个梯度线圈的梯度系统（3），RF系统和信号处理系统。 根据本发明，梯度线圈至少在稳定磁场的方向上被分割为子线圈（S 1，S 2）。 通过这样做，患者附近的梯度场的非成像成分的振幅减小，导致周围神经刺激减弱，从而提高图像质量。

公开(公告)号：US09689941B2

公开(公告)日：2017-06-27

申请号：US13993689

申请日：2011-12-05

申请人： Zhiyong Zhai ,  Michael Andrew Morich ,  Paul Royston Harvey ,  Miha Fuderer

发明人： Zhiyong Zhai ,  Michael Andrew Morich ,  Paul Royston Harvey ,  Miha Fuderer

IPC分类号： G01R33/3873 ,  G01R33/24 ,  G01R33/565 ,  G01R33/54 ,  G01R33/34

CPC分类号： G01R33/3873 ,  G01R33/246 ,  G01R33/34 ,  G01R33/34076 ,  G01R33/543 ,  G01R33/5659

摘要： Coil elements (18) generate a B1 excitation field in an examination region (14), which B1 excitation field is distorted by patient loading (e.g., wavelength effects). Passive shimming elements (22, 24) are disposed between the coil elements and the subject in order to improve the B1 field uniformity. In one embodiment, passive shimming elements include one or more dielectric rods (55) disposed below the subject which generate no substantial MR proton signal and which have a permittivity of at least 100 and preferably greater than 500. In another embodiment, tubes (24) adjacent each coil element are supplied with a dielectric liquid, a thickness of the dielectric liquid between the coil element and the subject adjusting a phase of the B1 field generated by the coil element. Active B1 shimming may be combined with passive shimming elements (22, 24) to effect an improved RF field homogeneity result.

公开(公告)号：US09588196B2

公开(公告)日：2017-03-07

申请号：US13977930

申请日：2011-12-27

申请人： Paul Royston Harvey ,  Wilhelmus Reinerius Maria Mens

发明人： Paul Royston Harvey ,  Wilhelmus Reinerius Maria Mens

IPC分类号： G01V3/00 ,  G01R33/34 ,  G01R33/36 ,  G01R33/561 ,  G01R33/565

CPC分类号： G01R33/34 ,  G01R33/3678 ,  G01R33/5612 ,  G01R33/5659

摘要： The invention relates to a multi-channel (e.g. quadrature) MRI transmit system in which RF power amplifiers having different power capabilities are used in different transmit channels. This results in reduced system costs, due to the avoidance of an unused excess of RF power capability when the power demand for obtaining a homogeneous B1-field (RF shimming) is asymmetric and the asymmetry is qualitatively the same for different imaging applications. The multi-channel transmit unit may also comprise a commutator which enables to selectively connect each RF power amplifier to each drive port of transmit coil arrangement (e.g. a birdcage coil).

摘要翻译： 本发明涉及一种多通道（例如正交）MRI发射系统，其中具有不同功率能力的RF功率放大器用于不同的发射信道。 这导致了当获得均匀B1场（RF匀场）的功率需求是不对称的且不对称性对于不同的成像应用在质量上是相同的时，由于避免了RF功率能力的未使用过量而导致系统成本降低。 多通道发射单元还可以包括换向器，其能够将每个RF功率放大器选择性地连接到发射线圈装置（例如鸟笼线圈）的每个驱动端口。

公开(公告)号：US09529063B2

公开(公告)日：2016-12-27

申请号：US14240966

申请日：2012-08-23

申请人： Paul Royston Harvey

发明人： Paul Royston Harvey

IPC分类号： G01V3/00 ,  G01R33/30 ,  G01R33/34 ,  G01R33/48 ,  G01R33/36

CPC分类号： G01R33/30 ,  G01R33/34007 ,  G01R33/36 ,  G01R33/48

摘要： A subject support (22) of a magnetic resonance (MR) system (10) includes a table top (20) supported by a support structure (24) and configured to move in and out of an examination volume (14). The subject support (22) further includes a coil connector (34) connected with a local receive coil (32). The coil connector (34) moves between an engaged position in which the coil connector (34) and the local receive coil (32) engage and move with the table top (20) in and out of the examination volume (14) and a disengaged position in which the coil connector (34) and the local receive coil (32) remain stationary out of the examination volume (14) as the table top (20) moves in and out of the examination volume (14).

摘要翻译： 磁共振（MR）系统（10）的主体支架（22）包括由支撑结构（24）支撑并被配置为移入和移出检查体积（14）的台面（20）。 主体支架（22）还包括与本地接收线圈（32）连接的线圈连接器（34）。 线圈连接器（34）在线圈连接器（34）和局部接收线圈（32）接合的接合位置与台面（20）进入和离开检查容积（14）之间移动，并且脱开 当台面（20）移动进入检查体积（14）时，线圈连接器（34）和局部接收线圈（32）保持固定在检查体积（14）之外的位置。